Patents by Inventor David John Barratt

David John Barratt has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Gasoline composition
    Patent number: 5948126
    Abstract: The invention provides a gasoline composition which comprises a mixture of hydrocarbons of the gasoline boiling range containing an octane requirement reducing amount of an additive which comprises a furfuryl alcohol resin or derivative thereof and the use of the additive in a concentrate for a preparation of such gasoline composition and a method of operating a spark-ignition engine using such gasoline composition.
    Type: Grant
    Filed: July 7, 1998
    Date of Patent: September 7, 1999
    Assignee: Shell Oil Company
    Inventors: David John Barratt, Gautam Tavanappa Kalghatgi, Jian Lin
  • Gasoline composition
    Patent number: 5925152
    Abstract: The invention provides a gasoline composition which comprises a mixture of hydrocarbons of the gasoline boiling range containing an octane requirement reducing amount of an additive comprising a furan derivative containing a furyl group bearing one or more substituents comprising one or more heterocyclic and/or one or more aryl groups; a concentrate for the preparation of such gasoline composition and a method of operating a spark-ignition engine using such gasoline composition.
    Type: Grant
    Filed: November 18, 1996
    Date of Patent: July 20, 1999
    Assignee: Shell Oil Company
    Inventors: David John Barratt, Jian Lin
  • Gasoline composition
    Patent number: 5891202
    Abstract: The invention provides a gasoline composition which comprises a mixture of hydrocarbons of the gasoline boiling range containing an octane requirement reducing amount of an additive which comprises a furfuryl alcohol resin or derivative thereof and the use of the additive in a concentrate for a preparation of such gasoline composition and a method of operating a spark-ignition engine using such gasoline composition.
    Type: Grant
    Filed: December 17, 1996
    Date of Patent: April 6, 1999
    Assignee: Shell Oil Company
    Inventors: David John Barratt, Gautam Tavanappa Kalghatgi, Jian Lin